B
Bank swallow's nest, [146].
Barnacles studies by Darwin, [34].
Beagle and Darwin's voyage, [25].
Beauty of human female, [127].
Biologists accept evolution, [278].
Bird colors, [131].
Bird from reptile, [122].
Bird nests, [145].
Birds of a region definite, [61].
Bird song, [135].
Blowing viper, [107].
Blue birds and frost, [61].
Bradbury, Dean, [43].
Buffon and evolution, [15].
Bumble bees, [125].
Butterfly colors, [129].
Butterfly's mouth, [95].